//
// Created by peteli on 2021/5/23.
//

#include "iostream"
#include "stdlib.h"
using namespace std;

void test01(){
    cout << "this is a test!" << endl;
};

void test02(int a){
    cout << "this is a test2! a" << endl;

};

int test03(){
    cout << "this is a test03!" << endl;
    return 1000;
};

int test04(int a){
    cout << "this is a test04" << endl;
    return a;
}


int main(){

    test01();

    test02(3);

    int num = test03();
    cout << "num = " << num << endl;

    int num2 = test04(10000);
    cout << "num2 = " << num2 << endl;

    system("pause");

    return 0;
}